Bleeding (ABS/TC 5.3)

Menu: Bleed (ABS/TC 5.3)

Bleeding

Important notes
The Bleed menu is not available with the Solo ABS (it is not required).

On vehicles with Traction Control, this menu can be used to bleed the ABD secondary circuit in the hydraulic unit.

This additional bleeding is necessary only after conventional bleeding has been performed and only if the hydraulic unit is replaced or was removed.

The secondary circuit also can be bled in the event that the brake pedal travel is too large if the system was properly bled by the conventional method beforehand.


Bleeding the ABD circuit
- Preliminary work: Bleed brakes by conventional method (repair group 47, Volume 4, Running gear).
- The bleeding unit remains connected (switched on) when the ABD circuit is being bled.
Bleeding pressure approximately 1.5...2.0 bar.




- Connect the Porsche System Tester 2 to the diagnostic socket. The diagnostic socket is located in the driver's footwell (left-hand drive vehicles) or passenger's footwell (right-hand drive vehicles) near the fuse box.
Switch on the ignition. Select the "Bleed" menu in the ABS/TC system.
- Open the rear right bleeder valve (use collection bottle).
- Press the Start key on the System Tester. This initiates certain functions in the hydraulic control unit (return pump, outlet solenoid valve and switchover solenoid valve are activated).
Bleed the system until the brake fluid emerges without bubbles.
In addition (during the entire bleeding process), fully depress the brake pedal to the stop (pump) at least ten times.

Important: Double the number of pumping cycles for vehicles with extremely high mileage or for very old vehicles, and use only half of the master brake cylinder stroke (damage could be caused to the master brake cylinder / primary boots).

- Close the right rear bleeder valve. Then immediately press Stop key on the System Tester.
- Switch off the ignition and disconnect the System Tester.
- Switch off and disconnect the bleeding unit. Correct the brake fluid level if necessary.